What is the delay in 1D bar API?


In the following Alpaca API call:


The last entry is alway the current day, with a timestamp of 00:00:00.

However, even if the last timestamp never change, the close and volume information change, which suggests that it is the last market values. I would like to confirm that. What is the delay?


I guess my question was not clear… When we call the 1D bars API, the close seams to have the lastest market values. What is the delay?